2.3.3.1 Communication
The communication item is mostly used to
Connect
to the 841-P-USB after
starting software. To use the COM port for another application without
closing the software, click
Ctrl /
Communication / Disconnect
.
2.3.3.2 Zero Offset
This feature resets the zero reading level to compensate for electronic offsets
in the monitor and thermal noise in the environment of the detector. When
the 841-P-USB receives the associated command, it subtracts the power
reading on all its internal hardware scales. Subsequent measurements will be
relative to this zero power level. Use this function once your power meter
has achieved thermal equilibrium to ensure accurate measurements.
For
instructions on the proper way to adjust the offset to zero your detector see
section 2.2 (Making a Measurement).
2.3.3.3 Acquire Data
This option allows you the choice of saving raw data (only), statistics (only),
or both raw data and statistics. When you select
Start Saving Raw Data
, a
dialog box appears. Type in the filename that you choose, then select save.
The 841-P-USB begins storing raw data according to your Data Sampling
settings (see section 2.3.2.2 and Table 2.2). If you will be putting the
information into a spreadsheet, use the
Save Both
option. All the raw data
will be at the top of the file, while all the statistical information will be at the
bottom of each period. The
Stop Saving
command stops the data recording
but the 841-P-USB will continue to provide measurements to the display.
2.3.3.4 Statistics
-Select
Start
to start collecting statistics(when stopped) or to restart them
when already in progress.
-Select
Stop
to freeze the statistics. The default statistics state is stopped.
2.3.3.5 Send Serial Command
This item opens a dialog box. Enter a command and click OK to send it to
the 841-P-USB. Only certain commands will work with the software; the
other ones are there for the user who builds his own application. The
commands are listed in
Section 3
and should only be used by an experienced
user. This item is rarely used.
2.3.4
Help - About
These two items are helpful to check the software version (About
Application) and the embedded firmware version (About Device). If you
should need help or additional information on the 841-P-USB or any
Newport products, do not hesitate to contact us. We will be glad to help you.
